CVE-2024-26644 (GCVE-0-2024-26644)
Vulnerability from cvelistv5
Published
2024-03-26 15:17
Modified
2026-01-05 10:34
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: don't abort filesystem when attempting to snapshot deleted subvolume If the source file descriptor to the snapshot ioctl refers to a deleted subvolume, we get the following abort: BTRFS: Transaction aborted (error -2) WARNING: CPU: 0 PID: 833 at fs/btrfs/transaction.c:1875 create_pending_snapshot+0x1040/0x1190 [btrfs] Modules linked in: pata_acpi btrfs ata_piix libata scsi_mod virtio_net blake2b_generic xor net_failover virtio_rng failover scsi_common rng_core raid6_pq libcrc32c CPU: 0 PID: 833 Comm: t_snapshot_dele Not tainted 6.7.0-rc6 #2 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-1.fc39 04/01/2014 RIP: 0010:create_pending_snapshot+0x1040/0x1190 [btrfs] RSP: 0018:ffffa09c01337af8 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffff9982053e7c78 RCX: 0000000000000027 RDX: ffff99827dc20848 RSI: 0000000000000001 RDI: ffff99827dc20840 RBP: ffffa09c01337c00 R08: 0000000000000000 R09: ffffa09c01337998 R10: 0000000000000003 R11: ffffffffb96da248 R12: fffffffffffffffe R13: ffff99820535bb28 R14: ffff99820b7bd000 R15: ffff99820381ea80 FS: 00007fe20aadabc0(0000) GS:ffff99827dc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000559a120b502f CR3: 00000000055b6000 CR4: 00000000000006f0 Call Trace: <TASK> ? create_pending_snapshot+0x1040/0x1190 [btrfs] ? __warn+0x81/0x130 ? create_pending_snapshot+0x1040/0x1190 [btrfs] ? report_bug+0x171/0x1a0 ? handle_bug+0x3a/0x70 ? exc_invalid_op+0x17/0x70 ? asm_exc_invalid_op+0x1a/0x20 ? create_pending_snapshot+0x1040/0x1190 [btrfs] ? create_pending_snapshot+0x1040/0x1190 [btrfs] create_pending_snapshots+0x92/0xc0 [btrfs] btrfs_commit_transaction+0x66b/0xf40 [btrfs] btrfs_mksubvol+0x301/0x4d0 [btrfs] btrfs_mksnapshot+0x80/0xb0 [btrfs] __btrfs_ioctl_snap_create+0x1c2/0x1d0 [btrfs] btrfs_ioctl_snap_create_v2+0xc4/0x150 [btrfs] btrfs_ioctl+0x8a6/0x2650 [btrfs] ? kmem_cache_free+0x22/0x340 ? do_sys_openat2+0x97/0xe0 __x64_sys_ioctl+0x97/0xd0 do_syscall_64+0x46/0xf0 entry_SYSCALL_64_after_hwframe+0x6e/0x76 RIP: 0033:0x7fe20abe83af RSP: 002b:00007ffe6eff1360 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fe20abe83af RDX: 00007ffe6eff23c0 RSI: 0000000050009417 RDI: 0000000000000003 RBP: 0000000000000003 R08: 0000000000000000 R09: 00007fe20ad16cd0 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe6eff13c0 R14: 00007fe20ad45000 R15: 0000559a120b6d58 </TASK> ---[ end trace 0000000000000000 ]--- BTRFS: error (device vdc: state A) in create_pending_snapshot:1875: errno=-2 No such entry BTRFS info (device vdc: state EA): forced readonly BTRFS warning (device vdc: state EA): Skipping commit of aborted transaction. BTRFS: error (device vdc: state EA) in cleanup_transaction:2055: errno=-2 No such entry This happens because create_pending_snapshot() initializes the new root item as a copy of the source root item. This includes the refs field, which is 0 for a deleted subvolume. The call to btrfs_insert_root() therefore inserts a root with refs == 0. btrfs_get_new_fs_root() then finds the root and returns -ENOENT if refs == 0, which causes create_pending_snapshot() to abort. Fix it by checking the source root's refs before attempting the snapshot, but after locking subvol_sem to avoid racing with deletion.
References
Impacted products
Vendor Product Version
Linux Linux Version: d68fc57b7e3245cfacf2e3b47acfed1946a11786
Version: d68fc57b7e3245cfacf2e3b47acfed1946a11786
Version: d68fc57b7e3245cfacf2e3b47acfed1946a11786
Version: d68fc57b7e3245cfacf2e3b47acfed1946a11786
Version: d68fc57b7e3245cfacf2e3b47acfed1946a11786
Version: d68fc57b7e3245cfacf2e3b47acfed1946a11786
Version: d68fc57b7e3245cfacf2e3b47acfed1946a11786
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-26644",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-06-21T16:07:39.514220Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-06-21T16:07:49.207Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T00:07:19.716Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/2bdf872bcfe629a6202ffd6641615a8ed00e8464"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/0877497dc97834728e1b528ddf1e1c484292c29c"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/6e6bca99e8d88d989a7cde4c064abea552d5219b"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/ec794a7528199e1be6d47bec03f4755aa75df256"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/d8680b722f0ff6d7a01ddacc1844e0d52354d6ff"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/7081929ab2572920e94d70be3d332e5c9f97095a"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/ioctl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c06941564027bdbc01d2df7f41e333c11cb0482d",
              "status": "affected",
              "version": "d68fc57b7e3245cfacf2e3b47acfed1946a11786",
              "versionType": "git"
            },
            {
              "lessThan": "2bdf872bcfe629a6202ffd6641615a8ed00e8464",
              "status": "affected",
              "version": "d68fc57b7e3245cfacf2e3b47acfed1946a11786",
              "versionType": "git"
            },
            {
              "lessThan": "0877497dc97834728e1b528ddf1e1c484292c29c",
              "status": "affected",
              "version": "d68fc57b7e3245cfacf2e3b47acfed1946a11786",
              "versionType": "git"
            },
            {
              "lessThan": "6e6bca99e8d88d989a7cde4c064abea552d5219b",
              "status": "affected",
              "version": "d68fc57b7e3245cfacf2e3b47acfed1946a11786",
              "versionType": "git"
            },
            {
              "lessThan": "ec794a7528199e1be6d47bec03f4755aa75df256",
              "status": "affected",
              "version": "d68fc57b7e3245cfacf2e3b47acfed1946a11786",
              "versionType": "git"
            },
            {
              "lessThan": "d8680b722f0ff6d7a01ddacc1844e0d52354d6ff",
              "status": "affected",
              "version": "d68fc57b7e3245cfacf2e3b47acfed1946a11786",
              "versionType": "git"
            },
            {
              "lessThan": "7081929ab2572920e94d70be3d332e5c9f97095a",
              "status": "affected",
              "version": "d68fc57b7e3245cfacf2e3b47acfed1946a11786",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/ioctl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.35"
            },
            {
              "lessThan": "2.6.35",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.296",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.210",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.149",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.76",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.15",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.7.*",
              "status": "unaffected",
              "version": "6.7.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.8",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.296",
                  "versionStartIncluding": "2.6.35",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.210",
                  "versionStartIncluding": "2.6.35",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.149",
                  "versionStartIncluding": "2.6.35",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.76",
                  "versionStartIncluding": "2.6.35",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.15",
                  "versionStartIncluding": "2.6.35",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.7.3",
                  "versionStartIncluding": "2.6.35",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.8",
                  "versionStartIncluding": "2.6.35",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: don\u0027t abort filesystem when attempting to snapshot deleted subvolume\n\nIf the source file descriptor to the snapshot ioctl refers to a deleted\nsubvolume, we get the following abort:\n\n  BTRFS: Transaction aborted (error -2)\n  WARNING: CPU: 0 PID: 833 at fs/btrfs/transaction.c:1875 create_pending_snapshot+0x1040/0x1190 [btrfs]\n  Modules linked in: pata_acpi btrfs ata_piix libata scsi_mod virtio_net blake2b_generic xor net_failover virtio_rng failover scsi_common rng_core raid6_pq libcrc32c\n  CPU: 0 PID: 833 Comm: t_snapshot_dele Not tainted 6.7.0-rc6 #2\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-1.fc39 04/01/2014\n  RIP: 0010:create_pending_snapshot+0x1040/0x1190 [btrfs]\n  RSP: 0018:ffffa09c01337af8 EFLAGS: 00010282\n  RAX: 0000000000000000 RBX: ffff9982053e7c78 RCX: 0000000000000027\n  RDX: ffff99827dc20848 RSI: 0000000000000001 RDI: ffff99827dc20840\n  RBP: ffffa09c01337c00 R08: 0000000000000000 R09: ffffa09c01337998\n  R10: 0000000000000003 R11: ffffffffb96da248 R12: fffffffffffffffe\n  R13: ffff99820535bb28 R14: ffff99820b7bd000 R15: ffff99820381ea80\n  FS:  00007fe20aadabc0(0000) GS:ffff99827dc00000(0000) knlGS:0000000000000000\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  CR2: 0000559a120b502f CR3: 00000000055b6000 CR4: 00000000000006f0\n  Call Trace:\n   \u003cTASK\u003e\n   ? create_pending_snapshot+0x1040/0x1190 [btrfs]\n   ? __warn+0x81/0x130\n   ? create_pending_snapshot+0x1040/0x1190 [btrfs]\n   ? report_bug+0x171/0x1a0\n   ? handle_bug+0x3a/0x70\n   ? exc_invalid_op+0x17/0x70\n   ? asm_exc_invalid_op+0x1a/0x20\n   ? create_pending_snapshot+0x1040/0x1190 [btrfs]\n   ? create_pending_snapshot+0x1040/0x1190 [btrfs]\n   create_pending_snapshots+0x92/0xc0 [btrfs]\n   btrfs_commit_transaction+0x66b/0xf40 [btrfs]\n   btrfs_mksubvol+0x301/0x4d0 [btrfs]\n   btrfs_mksnapshot+0x80/0xb0 [btrfs]\n   __btrfs_ioctl_snap_create+0x1c2/0x1d0 [btrfs]\n   btrfs_ioctl_snap_create_v2+0xc4/0x150 [btrfs]\n   btrfs_ioctl+0x8a6/0x2650 [btrfs]\n   ? kmem_cache_free+0x22/0x340\n   ? do_sys_openat2+0x97/0xe0\n   __x64_sys_ioctl+0x97/0xd0\n   do_syscall_64+0x46/0xf0\n   entry_SYSCALL_64_after_hwframe+0x6e/0x76\n  RIP: 0033:0x7fe20abe83af\n  RSP: 002b:00007ffe6eff1360 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\n  RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fe20abe83af\n  RDX: 00007ffe6eff23c0 RSI: 0000000050009417 RDI: 0000000000000003\n  RBP: 0000000000000003 R08: 0000000000000000 R09: 00007fe20ad16cd0\n  R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\n  R13: 00007ffe6eff13c0 R14: 00007fe20ad45000 R15: 0000559a120b6d58\n   \u003c/TASK\u003e\n  ---[ end trace 0000000000000000 ]---\n  BTRFS: error (device vdc: state A) in create_pending_snapshot:1875: errno=-2 No such entry\n  BTRFS info (device vdc: state EA): forced readonly\n  BTRFS warning (device vdc: state EA): Skipping commit of aborted transaction.\n  BTRFS: error (device vdc: state EA) in cleanup_transaction:2055: errno=-2 No such entry\n\nThis happens because create_pending_snapshot() initializes the new root\nitem as a copy of the source root item. This includes the refs field,\nwhich is 0 for a deleted subvolume. The call to btrfs_insert_root()\ntherefore inserts a root with refs == 0. btrfs_get_new_fs_root() then\nfinds the root and returns -ENOENT if refs == 0, which causes\ncreate_pending_snapshot() to abort.\n\nFix it by checking the source root\u0027s refs before attempting the\nsnapshot, but after locking subvol_sem to avoid racing with deletion."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-05T10:34:10.190Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c06941564027bdbc01d2df7f41e333c11cb0482d"
        },
        {
          "url": "https://git.kernel.org/stable/c/2bdf872bcfe629a6202ffd6641615a8ed00e8464"
        },
        {
          "url": "https://git.kernel.org/stable/c/0877497dc97834728e1b528ddf1e1c484292c29c"
        },
        {
          "url": "https://git.kernel.org/stable/c/6e6bca99e8d88d989a7cde4c064abea552d5219b"
        },
        {
          "url": "https://git.kernel.org/stable/c/ec794a7528199e1be6d47bec03f4755aa75df256"
        },
        {
          "url": "https://git.kernel.org/stable/c/d8680b722f0ff6d7a01ddacc1844e0d52354d6ff"
        },
        {
          "url": "https://git.kernel.org/stable/c/7081929ab2572920e94d70be3d332e5c9f97095a"
        }
      ],
      "title": "btrfs: don\u0027t abort filesystem when attempting to snapshot deleted subvolume",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-26644",
    "datePublished": "2024-03-26T15:17:17.614Z",
    "dateReserved": "2024-02-19T14:20:24.138Z",
    "dateUpdated": "2026-01-05T10:34:10.190Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/2bdf872bcfe629a6202ffd6641615a8ed00e8464\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/0877497dc97834728e1b528ddf1e1c484292c29c\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/6e6bca99e8d88d989a7cde4c064abea552d5219b\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/ec794a7528199e1be6d47bec03f4755aa75df256\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/d8680b722f0ff6d7a01ddacc1844e0d52354d6ff\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/7081929ab2572920e94d70be3d332e5c9f97095a\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T00:07:19.716Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-26644\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-06-21T16:07:39.514220Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-06-21T16:07:44.638Z\"}}], \"cna\": {\"title\": \"btrfs: don\u0027t abort filesystem when attempting to snapshot deleted subvolume\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"d68fc57b7e3245cfacf2e3b47acfed1946a11786\", \"lessThan\": \"c06941564027bdbc01d2df7f41e333c11cb0482d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d68fc57b7e3245cfacf2e3b47acfed1946a11786\", \"lessThan\": \"2bdf872bcfe629a6202ffd6641615a8ed00e8464\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d68fc57b7e3245cfacf2e3b47acfed1946a11786\", \"lessThan\": \"0877497dc97834728e1b528ddf1e1c484292c29c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d68fc57b7e3245cfacf2e3b47acfed1946a11786\", \"lessThan\": \"6e6bca99e8d88d989a7cde4c064abea552d5219b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d68fc57b7e3245cfacf2e3b47acfed1946a11786\", \"lessThan\": \"ec794a7528199e1be6d47bec03f4755aa75df256\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d68fc57b7e3245cfacf2e3b47acfed1946a11786\", \"lessThan\": \"d8680b722f0ff6d7a01ddacc1844e0d52354d6ff\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d68fc57b7e3245cfacf2e3b47acfed1946a11786\", \"lessThan\": \"7081929ab2572920e94d70be3d332e5c9f97095a\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/btrfs/ioctl.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.35\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.35\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.296\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.210\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.149\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.76\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.15\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.7.3\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.7.*\"}, {\"status\": \"unaffected\", \"version\": \"6.8\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/btrfs/ioctl.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/c06941564027bdbc01d2df7f41e333c11cb0482d\"}, {\"url\": \"https://git.kernel.org/stable/c/2bdf872bcfe629a6202ffd6641615a8ed00e8464\"}, {\"url\": \"https://git.kernel.org/stable/c/0877497dc97834728e1b528ddf1e1c484292c29c\"}, {\"url\": \"https://git.kernel.org/stable/c/6e6bca99e8d88d989a7cde4c064abea552d5219b\"}, {\"url\": \"https://git.kernel.org/stable/c/ec794a7528199e1be6d47bec03f4755aa75df256\"}, {\"url\": \"https://git.kernel.org/stable/c/d8680b722f0ff6d7a01ddacc1844e0d52354d6ff\"}, {\"url\": \"https://git.kernel.org/stable/c/7081929ab2572920e94d70be3d332e5c9f97095a\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbtrfs: don\u0027t abort filesystem when attempting to snapshot deleted subvolume\\n\\nIf the source file descriptor to the snapshot ioctl refers to a deleted\\nsubvolume, we get the following abort:\\n\\n  BTRFS: Transaction aborted (error -2)\\n  WARNING: CPU: 0 PID: 833 at fs/btrfs/transaction.c:1875 create_pending_snapshot+0x1040/0x1190 [btrfs]\\n  Modules linked in: pata_acpi btrfs ata_piix libata scsi_mod virtio_net blake2b_generic xor net_failover virtio_rng failover scsi_common rng_core raid6_pq libcrc32c\\n  CPU: 0 PID: 833 Comm: t_snapshot_dele Not tainted 6.7.0-rc6 #2\\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-1.fc39 04/01/2014\\n  RIP: 0010:create_pending_snapshot+0x1040/0x1190 [btrfs]\\n  RSP: 0018:ffffa09c01337af8 EFLAGS: 00010282\\n  RAX: 0000000000000000 RBX: ffff9982053e7c78 RCX: 0000000000000027\\n  RDX: ffff99827dc20848 RSI: 0000000000000001 RDI: ffff99827dc20840\\n  RBP: ffffa09c01337c00 R08: 0000000000000000 R09: ffffa09c01337998\\n  R10: 0000000000000003 R11: ffffffffb96da248 R12: fffffffffffffffe\\n  R13: ffff99820535bb28 R14: ffff99820b7bd000 R15: ffff99820381ea80\\n  FS:  00007fe20aadabc0(0000) GS:ffff99827dc00000(0000) knlGS:0000000000000000\\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n  CR2: 0000559a120b502f CR3: 00000000055b6000 CR4: 00000000000006f0\\n  Call Trace:\\n   \u003cTASK\u003e\\n   ? create_pending_snapshot+0x1040/0x1190 [btrfs]\\n   ? __warn+0x81/0x130\\n   ? create_pending_snapshot+0x1040/0x1190 [btrfs]\\n   ? report_bug+0x171/0x1a0\\n   ? handle_bug+0x3a/0x70\\n   ? exc_invalid_op+0x17/0x70\\n   ? asm_exc_invalid_op+0x1a/0x20\\n   ? create_pending_snapshot+0x1040/0x1190 [btrfs]\\n   ? create_pending_snapshot+0x1040/0x1190 [btrfs]\\n   create_pending_snapshots+0x92/0xc0 [btrfs]\\n   btrfs_commit_transaction+0x66b/0xf40 [btrfs]\\n   btrfs_mksubvol+0x301/0x4d0 [btrfs]\\n   btrfs_mksnapshot+0x80/0xb0 [btrfs]\\n   __btrfs_ioctl_snap_create+0x1c2/0x1d0 [btrfs]\\n   btrfs_ioctl_snap_create_v2+0xc4/0x150 [btrfs]\\n   btrfs_ioctl+0x8a6/0x2650 [btrfs]\\n   ? kmem_cache_free+0x22/0x340\\n   ? do_sys_openat2+0x97/0xe0\\n   __x64_sys_ioctl+0x97/0xd0\\n   do_syscall_64+0x46/0xf0\\n   entry_SYSCALL_64_after_hwframe+0x6e/0x76\\n  RIP: 0033:0x7fe20abe83af\\n  RSP: 002b:00007ffe6eff1360 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\\n  RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fe20abe83af\\n  RDX: 00007ffe6eff23c0 RSI: 0000000050009417 RDI: 0000000000000003\\n  RBP: 0000000000000003 R08: 0000000000000000 R09: 00007fe20ad16cd0\\n  R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\\n  R13: 00007ffe6eff13c0 R14: 00007fe20ad45000 R15: 0000559a120b6d58\\n   \u003c/TASK\u003e\\n  ---[ end trace 0000000000000000 ]---\\n  BTRFS: error (device vdc: state A) in create_pending_snapshot:1875: errno=-2 No such entry\\n  BTRFS info (device vdc: state EA): forced readonly\\n  BTRFS warning (device vdc: state EA): Skipping commit of aborted transaction.\\n  BTRFS: error (device vdc: state EA) in cleanup_transaction:2055: errno=-2 No such entry\\n\\nThis happens because create_pending_snapshot() initializes the new root\\nitem as a copy of the source root item. This includes the refs field,\\nwhich is 0 for a deleted subvolume. The call to btrfs_insert_root()\\ntherefore inserts a root with refs == 0. btrfs_get_new_fs_root() then\\nfinds the root and returns -ENOENT if refs == 0, which causes\\ncreate_pending_snapshot() to abort.\\n\\nFix it by checking the source root\u0027s refs before attempting the\\nsnapshot, but after locking subvol_sem to avoid racing with deletion.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.296\", \"versionStartIncluding\": \"2.6.35\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.210\", \"versionStartIncluding\": \"2.6.35\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.149\", \"versionStartIncluding\": \"2.6.35\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.76\", \"versionStartIncluding\": \"2.6.35\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.15\", \"versionStartIncluding\": \"2.6.35\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7.3\", \"versionStartIncluding\": \"2.6.35\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8\", \"versionStartIncluding\": \"2.6.35\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-01-05T10:34:10.190Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-26644\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-05T10:34:10.190Z\", \"dateReserved\": \"2024-02-19T14:20:24.138Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-03-26T15:17:17.614Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.